Function copyHeader

imageproxy.go:360–367

copyHeader copies values for specified headers from src to dst, adding to any existing values with the same header name.

(dst, src http.Header, headerNames ...string)

// copyHeader copies values for specified headers from src to dst, adding to
// any existing values with the same header name.
func copyHeader(dst, src http.Header, headerNames ...string) {
	for _, name := range headerNames {
		k := http.CanonicalHeaderKey(name)
		for _, v := range src[k] {
			dst.Add(k, v)
		}
	}
}

var (
	errReferrer         = errors.New("request does not contain an allowed referrer")